Blending Options-Gradient Overlay

Gradient’s parameters.

Applying the previous instrument, make one more element with the sizes from next image.

Blending Options-Gradient Overlay

Gradient’s parameters.

For your convenience, merge down all the layers containing the circle in a group.
Copy this new made group 4 times and applying Free Transform selection, increase it or minimize it if it’s necessary. Change the gradient also (the parameters are indicated for each particular case). Make everything look like in the next picture.

(Insert the Opacity of 37% in the Blending Options – Outer Glow parameter)
The next copy must have other parameters.